Question

Write in slope-intercept form an equation of the line that passes through the given points.

(1, 2), (−2, −1)
y=

Answer 1

y=x+1

Explanation:

m=(y2-y1)/(x2-x1)

m=(-1-2)/(-2-1)

m=-3/-3

m=1

y-y1=m(x-x1)

y-2=1(x-1)

y-2=x-1

y=x-1+2

y=x+1